SPOILER ALERT!,
Great demo! I just finished the game and wanted to say:
1- The game should be continued, I love being able to play 911 with my own voice and have all this environment crepping me out.
The Karen was really funny.
2- The monster wasnt really needed, sure it could represent lots of things like "its the representation of your guilt on the last call you had plus the guilt you already had for what happened at the begining of the game." but keeping him only in the environment is enough, plus you could keep the plushie thing but then when you see it on your table, make it disappear and move on with the game. (I hope the monster was just a way to end the demo and could be removed in the final game).
OR even maybe remove the monster after all!, everything else works perfectly for a real horror game. Its way better a game based on psychology horror than jumpscares (for me the game lost its horror with the monster, I just dont get scared by jumpscares :,T)
3- You could add more things in the background related to the calls. If the caller is reporting a thief, you could be able to see a darky figure breaking things on the office or you hear random footsteps in the office. If there's a fire, then your office could get some fire, etc etc...
Anyways, great demo. Hope the game could be bigger and last more than 15 game minutes. Sure with all the fame you got you could just ask volunteers for voice acting and history enrichment.